Strain E. coli JM83/pKP2 transformed with a recombi plasmid and phytase produced therefrom

ABSTRACT

This invention relates to a strain of  E.coli  JM83/pKP2 transformed by a plasmid and phytase produced therefrom, and more particularly, to the strain  E.coli  JM83/pKP2 transformed with a recombinant vector pKP1 or pKP2, so prepared by gene manipulation.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a strain E.coli JM83/pKP2 transformed with a novel plasmid and phytase produced therefrom and, more particularly, to a strain E.coli JM83/pKP2 transformed with a novel recombinant vector pKP1 or pKP2, so prepared by a gene manipulation, through elucidating the gene sequence intended for the mass production of novel phytase serving the role to enhance the phosphorous bioavailability in grains used as livestock feeds.

2. Description of the Prior Art

Phytase is an enzyme which degrades phytic acid into phosphate and phosphate inositol. 50˜70% of phosphate in grain used as livestock feeds exists in the form of phytic acid, but phytase is not present in monogastric animals such as hens and hogs, thus resulting in low phosphate availability. Further, indigested phytic acid phytate released to a water source has become one of the serious environment contamination sources and causes eutrophication in small lakes or tides. Further, monogastric animals can not utilize phytic acid in their intestine due to its chelation with a trace amount of minerals, amino acids and vitamins which are essential for the metabolism of livestock. These formed water insoluble and indigestible chelate-complexes released in the form of feces are responsible for the change of the environmental ecosystem, thus inducing a serious environmental contamination.

In view of these situations, the application of phytase into the livestock feeds can reduce the supply of inorganic phosphate due to an increase of phosphate bioavailability in livestock, thus leading to economic benefits. In addition, the improved availability of phosphate and other bioactive substances may also contribute much to the reduction of the environmental contamination.

In particular, the utilization of phytase in livestock is very important in that the law regulating the amount of phosphate in animal waste was established in 1996 in Korea and, in addition to that, it has been mandatory to add phytase in the feeds of animals in the European countries. Further, when phytase i added to the feeds, it may greatly improve the productivity of livestock by enhancing the availability of some bioactive substances such as vitamins and amino acids, including some trace elements such as calcium and zinc ions whose activity is reduced by chelation with negatively charged phytate. As such, the use of feeds containing phytase in livestock can enhance the availability of feeds and reduce the environmental contamination cause by phosphate.

From the aforementioned benefits, the intensive studies with respect to phytase including the effects of phytase on animals (L. G. Yound et al., 1993; X. G. Lei et al., 1994; Z. Morez et al., 1994) have been performed mainly in Europe (A. H. J. Ullah et al., 1994; K. C. Ehrich, 1994; C. S. Piddington, 1993). However, since phytase can cleave a limited number of phosphate only and is mostly produced by molds which have slow growth rate, it is not economical in terms of mass production. In addition, it is difficult to use the phytic acid as an additive for monogastric animals since it is undesirable for their physiological characteristics.

The inventor, et al. have performed intensive studies for overcoming the above problems associated with phytase. As a result, a novel strain Bacillus sp. DS-11 producing phytase with an excellent activity and different characteristics over the conventional phytase was identified and deposited to the Korean Collection for Type Cultures within the Korea Research Institute of Bioscience and Biotechnology affiliated with Korea Institute of Science and Technology (KCTC 0231BP), the Korean Patent Strain Depository Institute. The above patent application was filed with the Korean Industrial Patent Office (The Korean Patent Appl. No.: 96-6817). Hence, various characteristics on a novel phytase produced from the microorganism were investigated and, as a result, the novel phytase proved to be excellent on heat and pH with better stability.

From the above results, the inventor et al. sequenced the DNA by cloning some phytase-coding gene in a strain Bacillus sp. DS-11 under the patent application so as to ensure the mass production of a novel phytase having the above excellent characteristics. As a result, the phytase-coding gene sequence Bacillus sp. DS-11 was recognized to be a novel one, being entirely different from that of Aspergillus awamori(WO 94-3072A), Aspergillus ficum (EP 42038, U.S. Pat. No. 5,436,156), Aspergillus niger(EP 420358) and Aspergillus terreus(EP 684313) among the genes clones hitherto. Thus, its accessory No. U85968(date Jan. 21, 1997) was given from GenBank of NCBI in the U.S.A.

Next, the inventor et al. transformed E.coli with the plasmid vector (pKP1 or pKP2 ) encoding the phytase gene of Bacillus sp. DS-11, and the transformed strain E.coli JM83/pKP2 was deposited at the Korean Collection Type Cultures within the Korea Research Institute of Bioscience and Biotechnology affiliated with the Korea Institute of Science and Technology (KCTC 0308BP dated Jan. 28, 1997), the Korean Patent Strain Depository Institute.

SUMMARY OF THE INVENTION

Therefore, an object of this invention is to provide a plasmid vector pKP1 and pKP2 for transformation intended for mass production of phytase, a transformed strain E.coli JM83/pKP2 (KCTC 0308BP) herewith, and a process of mass production of phytase from said strain.

DESCRIPTION OF THE DRAWINGS

FIG. 1a shows the subcloning and mapping of pKP1 by restriction enzyme;

FIG. 1b shows the subcloning and mapping of pKP2 by restriction enzyme;

FIG. 2 shows the base sequence and the estimated amino acid sequence of phytase DS-11;

FIG. 3a shows the relative activity of phytase DS-11, produced from a transformed strain E.coli JM83/pKP2, on heat;

FIG 3 b shows the relative activity of phytase DS-11, produced from a transformed strain E.coli JM83/pKP2, on pH.

DETAILED DESCRIPTION OF THE INVENTION

This invention relates to a novel phytase from Bacillus sp. DS-11 and characterized by DNA base sequence of the sequence table 1 or amino acid sequence of the sequence table 2.

Also, this invention includes plasmid pKP1 or pKP2 containing DNA of sequence table 1, which is ligated in such a manner and expressed in E.coli.

Further, this invention includes a novel strain E.coli JM83/pKP2 (KCTC 0308BP) transformed with plasmid pKP1 or pKP2 containing the phytase-coding gene of the sequence table 1.

This invention is explained in more detail as set forth hereunder

According to this invention, the phytase-coding gene obtained from Bacillus sp. DS-11 is inserted into a plasmid pUC19 vector to prepare a novel recombinant DNA expression vector pKP1 or pKP2. After culturing E.coli JM-83 cloned by recombinant DNA expression vector, some colonies with effective expression potency are selected and then used for the mass production of phytase via cultivation of such colonies. Further, only pKP1 or pKP2, the recombinant DNA expression vector, is isolated from the colonies to determine its DNA sequence.

This invention is explained in more detail by the following steps.

Preparation of Novel Plasmid pKP1 and pKP2

(1) Sequencing of N-terminal amino acid

Purified phytase protein was applied to SDS-polyacrylamide gel electrophoresis (SDS-PAGE) and transferred to PVDF membrane(Bio-Rad Lab). Then the electroblotting was performed using 10 mM CAPS(3-cyclohexylamino-1-propanesulfonic acid) buffer solution containing 10% methanol under pH 11.0, 4° C. and 400 mA for 45 hours. After cleaving the desired protein band only, it was analyzed by the Edman method using a protein/peptide sequencer [Applied Biosystems model 476A Protein/Peptide Sequencer(Applied Biosystems Ins., CA, USA)]. N-terminal amino acid sequence of purified phytase protein:

Ser-Asp-Pro-Tyr-His-Phe-Thr-Val-Asn-Ala-Ala-X-Glu-Thr-Glu   (SEQ ID NO:3)

(2) Amino acid sequencing of inner peptide

Purified phytase protein was added to 70% formic acid to 1% (w/v) concentration, and with the addition of about 100-fold mass of CNBr, the mixture was reacted at room temperature for 24 hours. Then, 100-fold water was added to the reacting solution, and the reaction was discontinued. Using the same procedure as described in the above (1), electrophoresis was carried out to determine the amino acid sequence of inner peptide

N-terminal amino acid sequence of internal protein fragments of phytase cleaved with CNBr;

Ala-X-Asp-Asp-Glu-Tyr-Gly-Ser-Ser-Lcu-Tyr   (SEQ ID NO:4)

(3) Preparation of oligonucleotide probe

Oligonucleotide probe was designed based on the amino acid sequence obtained in the procedure as described in the above (1) and (2), and synthesized with DNA synthesizer(Applied Biosystems ABI380B).

With oligonucleotide, so synthesized by the above method as a primer and chromosomal DNA of DS-11 as template DNA as well as Taq DNA polymerase and dNTP in use, polymerase chain reaction(PCR) was carried out under the following conditions:

{circle around (1)} Denaturation: 95° C. for one minute

{circle around (2)} Annealing: 50° C. for one minute

{circle around (3)} Polymerization: 72° C. for one minute

{circle around (4)} Post-elongation: 72° C. for 7 minutes

Under the above condition, the PCR was carried out and followed by 1.5% agarose gel electrophoresis to obtain 600-bp PCR product. After recovering the PCR product from the gel, it was used as a probe.

Oligonucleotide probe based on N-terminal amino acid sequence;

Amino acid sequence:

1   2   3   4   5   6   7   8   9   10  11  12 13 14  15 Ser-Asp-Pro-Tyr-His-Phe-Thr-Val-Asn-Ala-AIa-X-Glu-Thr-Glu (SEQ ID NO:3) Possible combination of codons: 5′GAT-CCT-TAT-CAT-TTT3′ (SEQ ID NO:5)                                     C    C   C   C   C                                         G                                         A

Oligonucleotide probe based on N-terminal amino acid sequence of internal protein fragments:

Amino acid sequence:

1    2 3   4   5   6   7   8   9   10  11 Ala-X-Asp-Asp-Glu-Tyr-Gly-Ser-Ser-Leu-Tyr (SEQ ID NO:4) Possible combination of codons: 3′CTA-CTA-CTT-ATA-CCA5′ (SEQ ID NO:6)                                    G   G   C   G   G                                                    T                                                    C

(4) Hybridization of DS-11 genomic DNA

Chromosomal DNA derived from Bacillus sp. DS-11 was isolated by the Marmur method(Marmur J. 1961, Mol Biol. 3, 208). To ascertain whether the oligonucleotide probe prepared by the above (3) was appropriate in the screening of genomic library, genomic DNA cleaved with several restriction enzymes was applied to agarose gel electrophoresis and then transferred to the nylon membrane. Then, with DIG DNA labeling a detection kit (Boehringer Mannheim, Germany)] as well as 600-bp DNA fragments as a probe, so synthesized from the above (3), southern hybridization was performed. As a result, it was confirmed that when HindIII, Cla I and PstI were applied, the gene showed a positive signal at 2.2 kb, 4 kb and 6 kb, respectively When the genomic library of Bacillus sp. DS-11 was prepared, therefore, restriction enzyme HindIII was employed.

(5) Screening for the phytase-coding gene

Chromosomal DNA of Bacillus sp. DS-11 was cleaved with HindIII and then, 3-5 kb DNA fragments were screened. Such DNA fragments were also cleaved with HindIII, ligated to vector pUC19 treated with phosphatase (CIP) and introduced into the competent E.coli JM83. Such transformed strain was cultured in LB(Luria-Bertani) plate containing 100 μg/ml of ampicillin at 37° C. for 16 hours and transferred to the nylon membrane. Further, the strain was under colony hybridization with DNA oligonucleotide probe, so synthesized from the (3), to select some colonies representing the signal. In order to identify whether phytase gene of Bacillus sp. DS-11 was properly introduced into the host, the phytase activity was measured by the Fiske method (Fiske C. H. and Subbarow Y. P., J.Biol. Chem. 1925,66,375). As a result, 2 colonies having the signal could be obtained among 10,000 colonies. They were cultured and then plasmids, 4.9-kb in size joined by 2.2-kb insert DNA, were isolated. And such plasmid was named as pKP1. In addition, it was ascertained that pKP1 contained phytase gene properly inserted through measuring the expression potency of phytase.

(6) Mapping and subcloning using a restriction enzyme

As a result of cleaving 4.9kb pKP1 with several restriction enzymes, it was confirmed to be some restriction sites of EcoRI, BamHI, NdeI, HincII and EcoRV within 2.2-kb insert DNA. To find out the genes only necessary for the expression of enzyme potency, the subcloning of the pKP1 plasmid was carried out (FIG. 1a). pKP1 and pUC19 were cleaved with HindIII and Ndel, respectively, joined each other. Such plamid vector was introduced into E.coli JM83so that E.coli JM83with 4.4-kb pKP2 containing 1.7 kb-insert DNA might be obtained(FIG. 1b).

Transformation Process of Strain

Chromosomal DNA of Bacillus sp. DS-11 was cleaved with HindIII and then, 3-5 kb DNA fragments was selected. Such DNA fragments were also cleaved with HindIII, ligated to vector pUC19 treated with phosphatase (CIP) to obtain a novel plasmid pKP1 or pKP2. To express such plasmid into phytase, it was introduced into the competent E.coli JM83as a host. Thus, the transformed strain, was named as E.coli JM83/pKP2 and deposited to the Korean Collection for Type Cultures within the Korea Research Institute of Bioscience and Biotechnology affiliated to the Korea Institute of Science and Technology dated Jan. 28, 1997 (the accession No.: KCTC 0308BP).

The bacteriological, cultural and microbiological characteristics of the transformed strain were studied, and all results were the same as that of E.coli except for the production capability of phytase.

Isolation and Purification of Phytase Produced from the Transformed Strain

The novel strain E.coli JM83/pKP2, so transformed, was cultured in LB liquid medium containing 100 μg/ml of ampicillin at 37° C., centrifuged and recovered. The recovered microorganism was dissolved in the Tris buffer solution (10 mM,pH 7.0) containing 5 mM CaCl₂ and sonicated for 1 hour using Sonifier 450. Then, the sonicated microorganism was re-centrifuged, and its supernatants were used as crude enzyme solution. The protein saturated with 50% acetone was isolated on Fast Protein Liquid Chromatography (FPLC consisting of open column of phenyl sepharose CL-4B and Resource S superose 12HR 10/30 column), the same enzyme as phytase produced from Bacillus sp. DS-11 prior to gene manipulation could be isolated.

Measurement of Phytase Potency Produced from the Transformed Strain]

(1) Measurement of phytase potency

The novel strain E.coli JM83/pKP2, so transformed, was cultured in LB agar (Luria-Bertani) plate containing 100 μg/ml of ampicillin at 37° C. for 16 hours and transferred to the nylon membrane. The strain was applied to colony hybridization with DNA oligonucleotide probe, so synthesized in the above (3), so as to examine the colonies representing the signal. To ascertain whether phytase-coding gene of Bacillus sp. DS-11 was properly introduced into E.coli JM83, the phytase potency was measured by the Fiske method(Fiske C. H. and Subbarow Y. P., J.Biol. Chem. 1925,66, 375). As a result, the transformed strains having complete enzymatic activity were selected.

(2) Comparison on activity and stability of phytase on heat and pH including its molecular weight

To ascertain whether phytase produced from the transformed strain E.coli JM83/pKP2 was the same as that phytase produced from the original strain, the activity and stability on heat and pH of phytase were compared. To measure its stability on heat, each phytase was left at predetermined temperature for 10 minutes in the same method and then its residual activity measured. As shown in FIG. 3a. when calcium ion (Ca²⁺) was not added into the phytase-containing solution, the activity of phytase began to reduce at 40° C., while in case of adding 5 mM calcium ion, it was stabilized up to 70° C. and its activity was maintained by 50% even at 90° C.

Also, FIG. 3b shows the phytase activity depends on pH and the optimum pH of both phytases is 7.0. Further, to identify its stability on pH, each phytase was left at different values of pH for 1 hour and followed to measure its residual activity, respectively. Even at acidic condition of less than pH 4, both phytases showed significant enzymatic activity and thus, it was considered that they may be stabilized in the stomach.

Besides, both phytases have the same molecular weight of 43,000 Dalton.

From the above results, it was considered that phytase produced from the transformed strains was the same as one produced from the original one (Bacillus sp. DS-11).

DNA Sequencing of Phytase-coding Gene

To sequencing 1.7-kb insert DNA within pKP2, after deletion subclones in several different sizes were obtained based on restriction site. The DNA fragment of the total 1.7-kb was prepared from them with PCR using forward and reverse primers. And then, the open reading frame (ORF) of phytase consisting of 1149 nucleotides (383 amino acids) was sequenced using MacMolly 3.5 program and as a result, it was ascertained that the above phytase coincided with N-terminal amino acid of phytase 15 amino acids) isolated from Bacillus sp. DS-11 strain (FIG. 2). Further, it was considered that this was a novel phytase, being entirely different from that produced from the conventional Aspergillus sp. strains. As a result of analyzing its amino acid sequence, 80% between 175 amino acids of C-terminal of this invention and gene of operon regulated by the Sporulation Regulatory Protein of Bacillus subtilis was coincided.

Sequence Table 1

Sequence length: 1149

Type of sequence: Nucleic acid

Number of Chain: Double helix

Shape: Linear

Sequence type: Genomic DNA

Origin:

Name of species: Bacillus sp.

Name of strain: DS-11

Features of sequence:

Signal representing the features: CDS

Location of presence: 377. . . 1526

Method to determine the features: E

Signal representing the features: sig peptide

Location of presence: 377. . . 466

Method to determine the characteristics: E

Signal representing the characteristics: mat peptide

Location of presence: 467. . . 1526

Method to determine the characteristics: E

        10        20        30        40        50     60 Sequence 1 ATGAATCATT CAAAAACACT TTTGTTAACC GCGGCAGCCG GATTGATGCT CACATGCGGT GCGGTTTCTT CTCAGGCCAA ACATAAGCTG TCTGATCCTT ATCATTTTAC CGTGAATGCG GCGGCGGAAA CGGAGCCGGT TGATACAGCC GGTGATGCAG CTGATGATCC TGCGATTTGG CTGGACCCCA AGAATCCTCA GAACAGCAAA TGATCACAA CCAATAAAAAA ATCAGGCTTA GCCGTGTACA GCCTAGAGGG AAAGATGCTT CATTCCTATC ATACCGGGAA GCTGAACAAT GTTGATATCC GATATGCTTT TCCGTTGAAC GGAAAAAAAG TCGATATTGC GGCGGCATCC AATCGGTCTG AAGGAAACAA TACCATTGAG ATTTACGCCA TTGACGGGAA AAACGGCACA TTACAAAGCA TTACGGATCC AAACCGCCCG ATTGCATCAG CAATTGATGA AGTATACGGT TTCAGCTTGT ACCACAGTCA AAAAACAGGA AAATATTACG CGATGGTGAC AGGAAAAGAA GGCGAATTTG AACAATACGA ATTAAATGCG GATAAAAATG GATACATATC CGGCAAAAAG GTAAGGGCGT TTAAAATGAA TTCTCAGACA GAAGGGATGG CAGCAGACGA TGAATACGGC AGTCTTTATA TCGCAGAAGA AGATGAGGCC ATCTGGAAGT TCAGCGCTGA GCCGGACGGC GGCAGTAACG GAACGGTTAT CGATCGTGCC GATGGCAGGC ATTTAACCCC TGATATTGAA GGACTGACGA TTTACTACGC TGCTGACGGG AAAGGCTATC TGCTTGCCTC AAGCCAGGGT AACAGCAGCT ATGCGATTTA TGAAAGACAG GGACAGAACA AATATGTTGC GGACTTTCAG ATAACAGACG GGCCTGAAAC AGACGGCACA AGCGATACAG ACGGAATTGA CGTTCTGGGT TTCGGGCTGG GGCCTGAATA TCCGTTCGGT CTTTTTGTCG CACAGGACGG AGAGAATATA GATCACGGCC AAAAGGCCAA TCAAAATTTT AAAATGGTGC CATGGGAAAG AATCGCTGAT AAAATCGGCT TTCACCCGCA GGTCAATAAA CAGGTCGACC CGAGAAAAAT GACCGACACA AGCGGAAAAT AA

Sequence Table 2

Sequencing length:383

Sequencing form: amino acid

Shape: Linear

Sequence type: protein

  1   2   3   4   5   6   7   8   9   10 Sequence Met Asn His Ser Lys Thr Leu Leu Leu Thr Ala Ala Ala Gly Leu Met Leu Thr Cys Gly Ala Val Ser Ser Glu Ala Lys His Lys Leu Ser Asp Pro Tyr His Phe Thr Val Asn Ala Ala Ala Gln Thr Gln Pro Val Asp Thr Ala Gly Asp Ala Ala Asp Asp Pro Ala Ile Trp Leu Asp Pro Lys Asn Pro Glu Asn Ser Lys Leu Ile Thr Thr Asn Lys Lys Ser Gly Leu Ala Val Tyr Ser Leu Gln Gly Lys Met Leu His Ser Tyr His Thr Gly Lys Leu Asn Asn Val Asp Ile Arg Tyr Asp Phe Pro Leu Asn Gly Lys Lys Val Asp Ile Ala Ala Ala Ser Asn Arg Ser Gln Gly Lys Asn Thr Ile Gln Ile Tyr Ala Ile Asp Gly Lys Asn Gly Thr Leu Glu Ser Ile Thr Asp Pro Asn Arg Pro Ile Ala Ser Ala Ile Asp Gln Val Tyr Gly Phe Ser Leu Tyr His Ser Glu Lys Thr Gly Lys Tyr Try Ala Met Val Thr Gly Lys Gln Gly Gln Phe Gln Glu Tyr Gln Leu Asn Ala Asp Lys Asn Gly Tyr Ile Ser Gly Lys Lys Val Arg Ala Phe Lys Met Asn Ser Glu Thr Gln Gly Met Ala Ala Asp Asp Gtn Tyr Gly Ser Leu Tyr Ile Ala Gtn Gln Asp Gln Ala Ile Trp Lys Phe Ser Ala Gln Pro Asp Gly Gly Ser Asn Gly Thr Val Ile Asp Arg Ala Asp Gly Arg His Leu Thr Pro Asp Ile Gln Gly Leu Thr Ile Tyr Tyr Ala Ala Asp Gly Lys Gly Tyr Leu Leu Ala Ser Ser Glu Gly Asn Ser Ser Tyr Ala Ile Tyr Gln Arg Glu Gly Glu Asn Lys Tyr Val Ala Asp Phe Glu Ile Thr Asp Gly Phe Gln Thr Asp Gly Thr Ser Asp Thr Asp Gly Ile Asp Val Leu Gly Phe Gly Leu Gly Pro Gln Tyr Pro Phe Gly Leu Phe Val Ala Glu Asp Gly Gln Asn IIe Asp His Gly Glu Lys Ala Asn Glu Asn Phe Lys Met Val Pro Trp Gln Arg Ile Ala Asp Lys Ile Gly Phe His Pro Glu Val Asn Lys Glu Val Asp Pro Arg Lys Met Thr Asp Arg Ser Gly Lys

This invention has the advantages of economy with respect to the preparation of phytase in a large-scale since a recombinant DNA expression vector is prepared using the sequences of DNA and amino acid in such a manner as elucidated in the above and may be introduced into other living organisms having a rapid growth rate and easily regulatable to produce phytase having excellent activity and characteristics.

6 1 1820 DNA Bacillus sp. CDS (376)..(1524) 1 agcagacaag cccgtcaggg cgcgtcagcg ggtgttggcg ggtgtcgggg ctggcttaac 60 tatgcggcat cagagcagat tgtactgaga gtgcaccata tgttgaacaa tttcagcgag 120 ttaatgaaag aaaccaataa atcaaaaatt agagaaaaac attaatctga tgcgctttca 180 tatcgcgtta cccgattaat agaatagaaa ttacaaataa aacattgtac taaatattca 240 ttttaaatat ttgctcacgt caattttttc tcttcataaa tcctcacatt cggacaatct 300 tcacaaaaac ttaacactga acttcctgta tgtattttac aattaaagtg cacgttcata 360 aaaggaggat ggaaa atg aat cat tca aaa aca ctt ttg tta acc gcg gca 411 Met Asn His Ser Lys Thr Leu Leu Leu Thr Ala Ala 1 5 10 gcc gga ttg atg ctc aca tgc ggt gcg gtt tct tct cag gcc aaa cat 459 Ala Gly Leu Met Leu Thr Cys Gly Ala Val Ser Ser Gln Ala Lys His 15 20 25 aag ctg tct gat cct tat cat ttt acc gtg aat gcg gcg gcg gaa acg 507 Lys Leu Ser Asp Pro Tyr His Phe Thr Val Asn Ala Ala Ala Glu Thr 30 35 40 gag ccg gtt gat aca gcc ggt gat gca gct gat gat cct gcg att tgg 555 Glu Pro Val Asp Thr Ala Gly Asp Ala Ala Asp Asp Pro Ala Ile Trp 45 50 55 60 ctg gac ccc aag aat cct cag aac agc aaa ttg atc aca acc aat aaa 603 Leu Asp Pro Lys Asn Pro Gln Asn Ser Lys Leu Ile Thr Thr Asn Lys 65 70 75 aaa tca ggc tta gcc gtg tac agc cta gag gga aag atg ctt cat tcc 651 Lys Ser Gly Leu Ala Val Tyr Ser Leu Glu Gly Lys Met Leu His Ser 80 85 90 tat cat acc ggg aag ctg aac aat gtt gat atc cga tat gat ttt ccg 699 Tyr His Thr Gly Lys Leu Asn Asn Val Asp Ile Arg Tyr Asp Phe Pro 95 100 105 ttg aac gga aaa aaa gtc gat att gcg gcg gca tcc aat cgg tct gaa 747 Leu Asn Gly Lys Lys Val Asp Ile Ala Ala Ala Ser Asn Arg Ser Glu 110 115 120 gga aag aat acc att gag att tac gcc att gac ggg aaa aac ggc aca 795 Gly Lys Asn Thr Ile Glu Ile Tyr Ala Ile Asp Gly Lys Asn Gly Thr 125 130 135 140 tta caa agc att acg gat cca aac cgc ccg att gca tca gca att gat 843 Leu Gln Ser Ile Thr Asp Pro Asn Arg Pro Ile Ala Ser Ala Ile Asp 145 150 155 gaa gta tac ggt ttc agc ttg tac cac agt caa aaa aca gga aaa tat 891 Glu Val Tyr Gly Phe Ser Leu Tyr His Ser Gln Lys Thr Gly Lys Tyr 160 165 170 tac gcg atg gtg aca gga aaa gaa ggc gaa ttt gaa caa tac gaa tta 939 Tyr Ala Met Val Thr Gly Lys Glu Gly Glu Phe Glu Gln Tyr Glu Leu 175 180 185 aat gcg gat aaa aat gga tac ata tcc ggc aaa aag gta agg gcg ttt 987 Asn Ala Asp Lys Asn Gly Tyr Ile Ser Gly Lys Lys Val Arg Ala Phe 190 195 200 aaa atg aat tct cag aca gaa ggg atg gca gca gac gat gaa tac ggc 1035 Lys Met Asn Ser Gln Thr Glu Gly Met Ala Ala Asp Asp Glu Tyr Gly 205 210 215 220 agt ctt tat atc gca gaa gaa gat gag gcc atc tgg aag ttc agc gct 1083 Ser Leu Tyr Ile Ala Glu Glu Asp Glu Ala Ile Trp Lys Phe Ser Ala 225 230 235 gag ccg gac ggc ggc agt aac gga acg gtt atc gat cgt gcc gat ggc 1131 Glu Pro Asp Gly Gly Ser Asn Gly Thr Val Ile Asp Arg Ala Asp Gly 240 245 250 agg cat tta acc cct gat att gaa gga ctg acg att tac tac gct gct 1179 Arg His Leu Thr Pro Asp Ile Glu Gly Leu Thr Ile Tyr Tyr Ala Ala 255 260 265 gac ggg aaa ggc tat ctg ctt gcc tca agc cag ggt aac agc agc tat 1227 Asp Gly Lys Gly Tyr Leu Leu Ala Ser Ser Gln Gly Asn Ser Ser Tyr 270 275 280 gcg att tat gaa aga cag gga cag aac aaa tat gtt gcg gac ttt cag 1275 Ala Ile Tyr Glu Arg Gln Gly Gln Asn Lys Tyr Val Ala Asp Phe Gln 285 290 295 300 ata aca gac ggg cct gaa aca gac ggc aca agc gat aca gac gga att 1323 Ile Thr Asp Gly Pro Glu Thr Asp Gly Thr Ser Asp Thr Asp Gly Ile 305 310 315 gac gtt ctg ggt ttc ggg ctg ggg cct gaa tat ccg ttc ggt ctt ttt 1371 Asp Val Leu Gly Phe Gly Leu Gly Pro Glu Tyr Pro Phe Gly Leu Phe 320 325 330 gtc gca cag gac gga gag aat ata gat cac ggc caa aag gcc aat caa 1419 Val Ala Gln Asp Gly Glu Asn Ile Asp His Gly Gln Lys Ala Asn Gln 335 340 345 aat ttt aaa atg gtg cca tgg gaa aga atc gct gat aaa atc ggc ttt 1467 Asn Phe Lys Met Val Pro Trp Glu Arg Ile Ala Asp Lys Ile Gly Phe 350 355 360 cac ccg cag gtc aat aaa cag gtc gac ccg aga aaa atg acc gac aga 1515 His Pro Gln Val Asn Lys Gln Val Asp Pro Arg Lys Met Thr Asp Arg 365 370 375 380 agc gga aaa taaacatgaa aaaagcagct tatccaagct gctttttgat 1564 Ser Gly Lys gtgaagagcg tttcatgaga aagtcttgga acggatagcc gtaagcacag ccggcagccg 1624 gtcatacgtg tacgccggta ctgtctcttg ataattaagc gccgcgattt gtttacgttc 1684 acccgggttt gtcatataaa aatggatctt atccggaaaa tccgcaaacc cgctgtaaga 1744 aacaaatgtt gaaaacgggg gcgcgggaga aaggtctgtc agctgaaagg cctgacaagc 1804 cgcaatgtct aagctt 1820 2 383 PRT Bacillus sp. 2 Met Asn His Ser Lys Thr Leu Leu Leu Thr Ala Ala Ala Gly Leu Met 1 5 10 15 Leu Thr Cys Gly Ala Val Ser Ser Gln Ala Lys His Lys Leu Ser Asp 20 25 30 Pro Tyr His Phe Thr Val Asn Ala Ala Ala Glu Thr Glu Pro Val Asp 35 40 45 Thr Ala Gly Asp Ala Ala Asp Asp Pro Ala Ile Trp Leu Asp Pro Lys 50 55 60 Asn Pro Gln Asn Ser Lys Leu Ile Thr Thr Asn Lys Lys Ser Gly Leu 65 70 75 80 Ala Val Tyr Ser Leu Glu Gly Lys Met Leu His Ser Tyr His Thr Gly 85 90 95 Lys Leu Asn Asn Val Asp Ile Arg Tyr Asp Phe Pro Leu Asn Gly Lys 100 105 110 Lys Val Asp Ile Ala Ala Ala Ser Asn Arg Ser Glu Gly Lys Asn Thr 115 120 125 Ile Glu Ile Tyr Ala Ile Asp Gly Lys Asn Gly Thr Leu Gln Ser Ile 130 135 140 Thr Asp Pro Asn Arg Pro Ile Ala Ser Ala Ile Asp Glu Val Tyr Gly 145 150 155 160 Phe Ser Leu Tyr His Ser Gln Lys Thr Gly Lys Tyr Tyr Ala Met Val 165 170 175 Thr Gly Lys Glu Gly Glu Phe Glu Gln Tyr Glu Leu Asn Ala Asp Lys 180 185 190 Asn Gly Tyr Ile Ser Gly Lys Lys Val Arg Ala Phe Lys Met Asn Ser 195 200 205 Gln Thr Glu Gly Met Ala Ala Asp Asp Glu Tyr Gly Ser Leu Tyr Ile 210 215 220 Ala Glu Glu Asp Glu Ala Ile Trp Lys Phe Ser Ala Glu Pro Asp Gly 225 230 235 240 Gly Ser Asn Gly Thr Val Ile Asp Arg Ala Asp Gly Arg His Leu Thr 245 250 255 Pro Asp Ile Glu Gly Leu Thr Ile Tyr Tyr Ala Ala Asp Gly Lys Gly 260 265 270 Tyr Leu Leu Ala Ser Ser Gln Gly Asn Ser Ser Tyr Ala Ile Tyr Glu 275 280 285 Arg Gln Gly Gln Asn Lys Tyr Val Ala Asp Phe Gln Ile Thr Asp Gly 290 295 300 Pro Glu Thr Asp Gly Thr Ser Asp Thr Asp Gly Ile Asp Val Leu Gly 305 310 315 320 Phe Gly Leu Gly Pro Glu Tyr Pro Phe Gly Leu Phe Val Ala Gln Asp 325 330 335 Gly Glu Asn Ile Asp His Gly Gln Lys Ala Asn Gln Asn Phe Lys Met 340 345 350 Val Pro Trp Glu Arg Ile Ala Asp Lys Ile Gly Phe His Pro Gln Val 355 360 365 Asn Lys Gln Val Asp Pro Arg Lys Met Thr Asp Arg Ser Gly Lys 370 375 380 3 15 PRT Artificial Sequence Description of Artificial Sequence Synthetic phytase peptide 3 Ser Asp Pro Tyr His Phe Thr Val Asn Ala Ala Xaa Glu Thr Glu 1 5 10 15 4 11 PRT Artificial Sequence Description of Artificial Sequence Synthetic phytase peptide 4 Ala Xaa Asp Asp Glu Tyr Gly Ser Ser Leu Tyr 1 5 10 5 15 DNA Artificial Sequence Description of Artificial Sequence Synthetic oligonucleotide 5 gayccntayc aytty 15 6 15 DNA Artificial Sequence Description of Artificial Sequence Synthetic oligonucleotide 6 nccrtaytcr tcrtc 15 

What is claimed is:
 1. A plasmid having the DNA sequence as set forth in SEQ ID NO:
 1. 2. E.coli JM83/pKP2 transformed with a plasmid having the DNA sequence as set forth in SEQ ID NO:1.
 3. An isolated phytase produced from the strain E.coli JM83/pKP2.
 4. The phytase, according to claim 3, wherein said phytase has an amino acid sequence as set forth in SEQ ID NO:
 2. 